<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>固定的footer</title>
		<style>
			.Site{
				display: flex;
				flex-direction: column;
				min-height: 95vh;
			}
			.Site-content{
				flex: 1;
			}
		</style>
	</head>
	<body>
		<body class="Site">
		  <header>...</header>
		  <main class="Site-content">...</main>
		  <footer style="height: 120px;background-color: blanchedalmond;">footer</footer>
		</body>
	</body>
</html>
